Sometimes, VCU gets around to doing something about the unevenness of some of its sidewalks.
In six years, I never saw a section realligned or re-poured. I have seen where small
patches of concrete have been poured and shaped to create ramps - that are always steeper
than the slab they're "fixing."

And sometimes, they use tar and gravel. Maybe this is because concrete attracts people who
mostly seem to write what they think will disturb others the most.